Tim, check out a picture of my layout in a Viper 5.25.
http://rib.net/forum/showthread.php?...ight=danny+boy
As you can see I managed to fit a single jockey in by moving the bench as far back as poss. It is quite a good seating layout as when I need to I can seat myself and 3 adults on the boat comfortably also the storage in the bench seat is invaluable.
My boat had a white bench seat set as a jockey when I bought it and it did work ok although not ideal I sold this on ebay for £90 to help fund the new seats from Leeway.
Chris